COMPUTER PART=1

In the seven-layer OSI model of computer networking. the physical layer or layer 1, is the first and lowest layer. Devices that operate at the physical layer include repeaters, hubs, network interface cards (NICS), cables and connectors. Repeaters are used to regenerate electrical signals that have attenuated (ie. weakened) as a result of distance.

Machine language is a low-level language made up of binary numbers or bits that a computer can understand. It is also known as machine code or object code and is extremely tough to comprehend. The only language that the computer understands is machine language. All programmes and programming languages, such as Swift and C++, produce or run programmes in machine language before they are run on a computer. When a specific task, even the smallest process executes, machine language is transported to the system processor, Computers are only able to understand binary data as they are digital devices.

Routers are networking devices operating at layer three or a network layer of the OSI model. They are responsible for receiving, analysing, and forwarding data packets among the connected computer networks. When a data packet arrives, the router inspects the destination address, consults its routing tables to decide the optimal route and then transfers the packet along this route.

The data that is processed is known as information. The processing of data is the alteration of raw data to usable data over a process. Data is processed to give outcomes that contribute to a solution to a problem or improve a current situation.

Cloud computing is the delivery of different services through the Internet. These resources include tools and applications like data storage, servers, databases, networking, and software.

Rather than keeping files on a proprietary hard drive or local storage device, cloud-based storage makes it possible to save them to a remote database. As long as an electronic device has access to the web, it can access to the data and the software programs to run.

In Windows operating system, the shortcut key to undo a task is Ctrl + Z.

Ctrl is used to copy the selected text, image or any item from the clipboard.

To repeat something simple, such as a paste operation, press Ctrl + Y or F4 (If F4 doesn't seem to work, you may need to press the F-Lock key or Fn Key, then F4) Control + A, and Ctrl A is a keyboard shortcut most often used to select all text, files, pictures, or other objects while in a graphical user environment

In Windows operating system, the shortcut key to undo a task is Ctrl + Z.

Ctrl is used to copy the selected text, image or any item from the clipboard.

To repeat something simple, such as a paste operation, press Ctrl + Y or F4 (If F4 doesn't seem to work, you may need to press the F-Lock key or Fn Key, then F4) Control + A, and Ctrl A is a keyboard shortcut most often used to select all text, files, pictures, or other objects while in a graphical user environment

Ctrl E is used in Microsoft Word 2019 for the shortcut of "Align the text to centre". Ctrl T is used in Microsoft Word 2019 for the shortcut of "Open a new tab in Internet Browser" Ctrl C is used in Microsoft Word 2019 for the shortcut of "Copy the text Ctrl L is used in Microsoft Word 2019 for the shortcut of "Align the test to the left edge

Key Fl uses to open Help and Support window. FI with windows key shows up Windows Help and Support screen. It Can be used to enter CMOS setup.

Ctrl F2 display a print preview window in the Microsoft Word. Quickly rename a selected folder or file.